jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

Count the number of occurrences in string

Benchmark created by vsync on June 14, 2011

Test runner

Ready to run.

Testing in
Test		Ops/sec
regular expression	`"124682895579215".match(/2/g).length;`	ready
split	`"124682895579215".split("2").length - 1`	ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

Revision 1: published by vsync on June 14, 2011
Revision 2: published by witek on June 15, 2011
Revision 3: published on December 8, 2011
Revision 4: published on December 8, 2011
Revision 5: published on December 8, 2011
Revision 6: published on December 8, 2011
Revision 13: published on April 18, 2012
Revision 14: published on April 18, 2012
Revision 16: published by Meryn Stol on November 18, 2012
Revision 17: published by Meryn Stol on November 18, 2012
Revision 27: published by Sam on September 18, 2014